GrowFAQ:

How do I convert watts to amps and amps to watts?

 Added by: 10k  Last edited by: 10k  Viewed: 526 times Rated by 9 users: 10.00/10 Contributed by: TieDown The formula for converting Watts to Amps is : Watts = Amps * Volts The formula for converting Amps to Watts is : Amps = Watts / Volts SAFTEY WARNING : Only use 80% of the circuit breaker capacity! Common Conversions North American and other 110 volt countries Lights : 1000W / 110V = 9.1A 600W / 110V = 5.4A 400W / 110V = 3.6A 250W / 110V = 2.3A Circuits : 10A * 110V = 1100W and 80% safe usage is 880W 15A * 110V = 1650W and 80% safe usage is 1320W 25A * 110V = 2750W and 80% safe usage is 2200W 30A * 110V = 3300W and 80% safe usage is 2640W Common Conversions British Commonwealth and other 240 volt countries Lights : 1000W / 240V = 4.1A 600W / 240V = 2.5A 400W / 240V = 1.7A 250W / 240V = 1.1A Circuits : 10A * 240V = 2400W and 80% safe usage is 1920W 15A * 240V = 3600W and 80% safe usage is 2880W 25A * 240V = 6000W and 80% safe usage is 4800W 30A * 240V = 7200W and 80% safe usage is 5760W Remember that a circuit services more than one power outlet. A two outlet wall plug will use only one circuit. There will be more outlets on 240V systems per circuit than there will be in 110V systems. Last modified: 16:49 - Feb 25, 2002
 faq:1230 "How do I convert watts to amps and amps to watts?"